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Preparation method of nanofiber sandwich type protective facial mask

A nanofiber, sandwich-type technology, applied in the field of sanitary product preparation, can solve the problems of low strength and poor filterability of non-woven fabrics, and achieve the effects of high filter cutoff, low price and wide source.

Inactive Publication Date: 2013-02-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combine it with traditional nonwoven materials to prepare sandwich materials, overcome the shortcomings of low strength of electrospun nanofibers, and at the same time solve the problem of poor filterability of nonwoven fabrics for ordinary protective masks, and comprehensively consider factors such as air permeability and bacterial filtration efficiency Influence, provide ideas for the application of nanofibers in practice

Method used

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  • Preparation method of nanofiber sandwich type protective facial mask
  • Preparation method of nanofiber sandwich type protective facial mask

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) The weighed M W =130000, cellulose diacetate chips with acetylation degree of 38% are dissolved in the mixed solution of acetone and DMAc, wherein the volume ratio of acetone and DMAc is 3:2, and it is configured as cellulose diacetate spinning with a mass fraction of 10%. solution, the spinning solution was stirred on a magnetic stirrer for 4.5 hours, and stood still for a period of time until the bubbles in the solution disappeared, which was the solution used.

[0025] (2) Inject the prepared spinning solution into the liquid storage tube of the electrospinning device, fix it on the micro-syringe pump, the inner diameter of the capillary is 0.7mm, and the electrospinning process conditions are: the voltage is 16kV, and the flow rate is 0.5ml / h , The receiving distance is 12cm.

[0026] (3) Using the non-woven fabric as the acceptor, the spinning time is controlled to be 3 minutes, and the diacetate nanofiber membrane with an average diameter of 250-300 nm is obt...

Embodiment 2

[0029] (1) The weighed M W =130000, cellulose diacetate chips with acetylation degree of 38% are dissolved in the mixed solution of acetone and DMAc, wherein the volume ratio of acetone and DMAc is 3:2, and it is configured as cellulose diacetate spinning with a mass fraction of 10%. solution, the spinning solution was stirred on a magnetic stirrer for 4.5 hours, and stood still for a period of time until the bubbles in the solution disappeared, which was the solution used.

[0030] (2) Inject the prepared spinning solution into the liquid storage tube of the electrospinning device, fix it on the micro-syringe pump, the inner diameter of the capillary is 0.7mm, and the electrospinning process conditions are: the voltage is 16kV, and the flow rate is 0.5ml / h , The receiving distance is 12cm.

[0031] (3) Using the non-woven fabric as the acceptor, the spinning time is controlled to be 5 minutes, and the diacetate nanofiber membrane with an average diameter of 250-300 nm is obt...

Embodiment 3

[0034] (1) Dissolve the weighed PLA in a dichloromethane solution to prepare a spinning solution with a mass fraction of 8%, and stir the spinning solution on a magnetic stirrer for 5 hours to obtain the solution used.

[0035] (2) Inject the prepared spinning solution into the liquid storage tube of the electrospinning device, fix it on the micro-syringe pump, the inner diameter of the capillary is 0.7mm, and the electrospinning process conditions are: the voltage is 15kV, and the flow rate is 0.8ml / h , The receiving distance is 15cm.

[0036] (3) Using the non-woven fabric as the acceptor, the spinning time is controlled to be 3 minutes, and the nanofiber membrane with an average diameter of 500-600 nm is obtained by the plate collection method, and compounded with another layer of non-woven fabric to prepare a sandwich material.

[0037] (4) Carry out pore size and distribution test, air permeability and bacterial filtration efficiency and other interception performance tes...

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Abstract

The invention discloses a preparation method of a sandwich type medical protective facial mask and other sandwich type protective facial masks with nanofibers serving as a core layer. The sandwich type protective facial mask is characterized in that a nanofiber film is added in the middle of the conventional protective facial mask which is made of double-layer non-woven fabrics. The preparation method comprises the following steps of: preparing spinning solution in certain mass fraction; transferring the spinning solution into a liquid storing pipe of a spinning device; statically spinning by adopting the common non-woven fabric as an acceptor, so as to obtain the nanofiber film with diameter of 200-600nm; and compositing the obtained nanofiber film with a non-woven material, so as to obtain a sandwich material in a form of 'non-woven fabric-nanofiber film-non-woven fabric'. The preparation method has the advantages that the materials are available and moderate in price; the preparation is quick, simple and convenient; the operation is easy; and the sandwich layer slightly influences the ventilating rate of the material, and plays a remarkable role in the improvement of the bacterial filtration efficiency.

Description

technical field [0001] The invention belongs to the field of hygiene product preparation, and in particular relates to a nanofiber sandwich protective mask and its preparation technology. Background technique [0002] Medical protective masks are the main way for doctors to prevent respiratory infections and surgical infections, and prevent blood and body fluids from spreading diseases, so the requirements for protection levels are very high. Traditional medical masks and other protective products are made of single-layer, double-layer or multi-layer non-woven fabrics or gauze. Due to the large pore size and high porosity of these materials, the filtration efficiency for bacteria and particles with small diameters is relatively low. Low. [0003] Electrospinning technology can prepare nano-scale polymer fibers. Nano-fibers have the characteristics of large specific surface area, porosity, and small diameter, and have remarkable filtering effects on gases, liquids, and parti...

Claims

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Application Information

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IPC IPC(8): A41D13/11D04H1/728
Inventor 王鸿博蔡京昊万玉芹高卫东傅佳佳
Owner JIANGNAN UNIV
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